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Non-ignorable contribution of anthropogenic source to aerosols in Arctic Ocean

机译：人为源对北冰洋气溶胶的不可知贡献

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摘要

Arctic Ocean (AO) atmospheric aerosols, which are a factor influencing regional and global climate, have been greatly influenced by an increase in anthropogenic sources. To identify the impact of anthropogenic sources on regional aerosols in the AO and middle and low latitudes (MLO), a single-particle aerosol mass spectrometer was used to count and size aerosols with diameters less than 2.5 μm (PM_(2.5)) and determine their chemical composition. The mean hourly count of PM_(2.5) aerosols was 1639/h in the AO, which was 57.1% lower than that in the MLO. Na_MSA, sulfate, and Na_rich were three major components, which accounted for 74.3% of PM_(2.5) aerosols in the AO. The size distribution of PM_(2.5) aerosols was unimodal, peaking between 0.42 μm and 1.64 μm. A source apportionment method for single aerosol particles in the Arctic was established using positive matrix factorization (PMF) combined with backward air mass trajectory and principal component analysis (PCA). Three potential sources of aerosols were identified: marine sources; anthropogenic sources; and secondary formation. The largest contribution to aerosols in the AO was from marine sources, accounting for 50.6%. This source was 20.4% higher in the AO than that in the MLO. Secondary formation contributed 19.8% and 36.5% to aerosols in the AO and MLO, respectively. However, the contribution of anthropogenic sources to aerosols was 29.6% in the AO, and this was 3.7% lower than that in the MLO. Our study provides a useful method for identifying sources of aerosols in the Arctic, and the results showed that although marine sources were the largest contributors to aerosols in the AO, the contribution of anthropogenic sources could not be ignored.
机译：北极海洋（AO）大气气溶胶，这是一种影响区域和全球气候的因素，受到人为源的增加受到影响。为了鉴定人为源源对AO和中纬​​度和低纬度（MLO）的区域气溶胶的影响，使用单粒子气溶胶质谱仪计数和尺寸直径小于2.5μm的气溶胶（PM_（2.5））并确定他们的化学成分。 PM_（2.5）气溶胶的平均每小时计数为1639 / h，比MLO低57.1％。 na_msa，硫酸盐和na_rich是三种主要成分，占AO中的74.3％的PM_（2.5）气溶胶。 PM_（2.5）气溶胶的尺寸分布是单峰的，峰值在0.42μm和1.64μm之间。使用正矩阵分解（PMF）与后向空气质量轨迹和主成分分析（PCA）建立了北极中单个气溶胶颗粒的源分配方法。确定了三种潜在的气溶胶来源：海洋来源;人为的来源;和二级形成。对AO气溶胶的最大贡献来自海洋来源，占50.6％。在AO中，这一来源比MLO中的源更高20.4％。二级形成分别为AO和MLO中的气溶胶贡献了19.8％和36.5％。然而，AO中，人为源源对气溶胶的贡献为29.6％，比MLO中的比例低3.7％。我们的研究提供了识别北极地区气溶胶来源的有用方法，结果表明，虽然海洋来源是AO中气溶胶的最大贡献者，但不忽视人为来源的贡献。

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  • 来源
    《Environmental research》 |2021年第10期|111538.1-111538.9|共9页
  • 作者

    Shanshan Wang; Jinpei Yan; Qi Lin; Shuhui Zhao; Suqing Xu; Lei Li; Miming Zhang; Liqi Chen;

  • 作者单位

    Key Laboratory of Global Change and Marine Atmospheric Chemistry Ministry of Natural Resources Xiamen 361005 China Third Institute of Oceanography Ministry of Natural Resources Xiamen 361005 China;

    Key Laboratory of Global Change and Marine Atmospheric Chemistry Ministry of Natural Resources Xiamen 361005 China Third Institute of Oceanography Ministry of Natural Resources Xiamen 361005 China;

    Key Laboratory of Global Change and Marine Atmospheric Chemistry Ministry of Natural Resources Xiamen 361005 China Third Institute of Oceanography Ministry of Natural Resources Xiamen 361005 China;

    Key Laboratory of Global Change and Marine Atmospheric Chemistry Ministry of Natural Resources Xiamen 361005 China Third Institute of Oceanography Ministry of Natural Resources Xiamen 361005 China;

    Key Laboratory of Global Change and Marine Atmospheric Chemistry Ministry of Natural Resources Xiamen 361005 China Third Institute of Oceanography Ministry of Natural Resources Xiamen 361005 China;

    Institute of Mass Spectrometer and Atmospheric Environment Jinan University Guangzhou 510632 China;

    Key Laboratory of Global Change and Marine Atmospheric Chemistry Ministry of Natural Resources Xiamen 361005 China Third Institute of Oceanography Ministry of Natural Resources Xiamen 361005 China;

    Key Laboratory of Global Change and Marine Atmospheric Chemistry Ministry of Natural Resources Xiamen 361005 China Third Institute of Oceanography Ministry of Natural Resources Xiamen 361005 China;

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  • 正文语种 eng
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  • 关键词

    Arctic aerosols; Components; Size distribution; Anthropogenic sources;

    机译：北极气溶胶;成分;尺寸分布;人为来源;

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